Improvement in lubbicatobs



'nirrb tnts datent @ffice Letters Patent No. 76,774, dated April 1d,1868.

IMPROVEMENT IN LUBRICTORS.

filip tlgvehtle etant tu in tgise ietters rteut :mt mailing 'peut tt tiptame.

TO. ALL WHOM I'l MAY CONCERN:

Be it known that I, ERASTUs .IOHNSONLof Wilkins, in the county ofAllegheny, and State of Pennsylvania, have invented a new and improvedLubricator; 'and I do hereby declare the following to be a full, clear,and exact description of the same, suiicient to enable those skilled inthe art to which my invention appertains to make useof it, referencebeinghad to the accompanying drawings, `formingr part ofthisspecication, in which- Figure 1 is a verticalsection, l

Figure? an end elevation of my invention, .and

Figure 3 being abottom view of the stopple E. y l

In this'inven'tion the body of the oil-cup is made of metal, its endsbeing tif-glass The screiwplug, that regulates the-110W of the oil, isoperated in a novel manner, anda new method of packing the oil-cup, soas to render it air-tight, is adopted.`

In the, drawings, A represents a-hoi'izontal cylindricaltharrcl, ofmetal or wood, which forms the body of the oil-cup, and B B are its endsor heads, made of thick, clear glass. This method of construction isadopted in preference to making the whole vessel of an opaque material,for the purpose of enabling any one to linspect the condition of the oilin the cupwithouttlie necessity oi`.remov ing a cover or plug; and it isemployed in preference to making the vessel entirely of glassfi'orfhepurpose, in the first place, oi' economy of'con'structioin. andsecondly, that the glass ends, by their formfand bythe projecting wallsoi` V the barrel, may he less liable to fracture than the cup Would'beii" composed entirely of glass.

- C is a ta erin@- hollow stem, throuvh which the oil is feddfrom the o.linder A to the maehiner At its .P ai a .Y y

top it is provided with a wooden valve-seat, e, that material bei-.ngemployed on account of the greater tightness withwhich the valve can beclosed upon it. v t l i I The ilow of lthe oil from the cylinder 4A tothe machinery isregulated by 'a plugvalve, D, which screws up and downthrough lugs e e, and seats 'upon the wood above described.

A metallic neck or tube, I, extends upward from the'cent're ofthe upper`side of the cylinder, directly over the stem C, audits inner walls arecnt into a female screw," as, se-en in fig. 1. The stem of the valveextends up into this neck, and is there expanded into a bro-ad head, m,the edges oi which are made sharp, so as to run betxveen 'thescrew-threads, and by means of them to screw the valve-rod up and down.A loose stopple, E, is inserted in the neck, and is provided with lugsor jaws c e, which bestride the' head m of the valve-stem,

as seen in iig. -l', and enable the operator to turn the valve-stem, andthus screw it up or down, and seat or i 'unseat the valve by simplyturning. the stopple E. In'dorder to pack the stopple E air-tight, andat the same time to hold it steadily in its place and preventit frombeing jarrecl-out, I slip a broad rubber band, J', over it, as shown inboth drawings). A 'v y Having thus described my invention, what Iclaimas new, and desire tol secure by- Letters Patent, is The combination ofthe valve-stem D, having the head m, with' the neck I, and stopple E,having the jaws e e, all constructed and combined substantially as andfor the'purpose set forth:

' ERAsTs JOHNSON. Witnesses;

THoMAs DAv1soN,-- MARY E. DAvIsoN.

